"Mega Shark vs. Mecha Shark," which debuts at 9 p.m. July 26. Christopher Judge and Elisabeth Rohm star. Syfy provided this preview: "When the U.S. government creates an exact robotic copy of the original mega shark, this new mecha shark runs wild -- with only the original mega shark standing in the way of global destruction."

"Sharkmania: The Top 15 Biggest Baddest Bloodiest Bites" premieres at 9 p.m. July 27. "This original documentary special takes a light-hearted look back at the 15 best shark movie bites of all time," Syfy said. Weighing in will be Ziering, McGrath, Brooke Hogan and Richard Moll.